body,html
	line-height: 1
	font-weight: 200
	font-family: 'PingFang SC', 'STHeitiSC-Light', 'Helvetica-Light', arial
.border-1px (-webkit-min-device-pixel-ratial: 1.5),(min-device-pixel-ratial: 1.5)
	.border-1px
		&::after
			webkit-transform: scaleY(0.7)
			transform: scaleY(0.7)
		&::before
			webkit-transform: scaleY(0.7)
			transform: scaleY(0.7)

.clearfix
	display:inline-block
	&:after
		display:block
		height: 0
		line-height: 0
		content: '.'
		font-size: 0
		clear: both
		visibility: hidden

.border-1px (-webkit-min-device-pixel-ratial: 2),(min-device-pixel-ratial: 2)
	.border-1px
		&::after
			webkit-transform: scaleY(0.5)
			transform: scaleY(0.5)
		&::before
			webkit-transform: scaleY(0.5)
			transform: scaleY(0.5)